Diseases Flashcards
Features of asbestosis?
Curvilinear subpleural lines
Parenchymal bands 2-5cm running at angle inconsistent with vessels
Thickened, short peripheral lines
Honeycombing
Hamartoma definition, pulmonary origin and tissue characteristics
Disorganised, abnormal amounts of tissue normally found in organ of origin
Mesenchymal origin
Contain fat and cartilage, usually
Often calcified
Proportion of pulmonary hamartomas that show popcorn calcification on plain film?
1/3
Proportion of hamartomas that contain fat? HU range suggestive of hamartoma?
50%
-120 to -40HU
Types of alveolar proteinosis?
Congenital - defect in surfactant protein
Secondary - inorganic dusts
Acquired - idiopathic ? autoimmune
Appearance and distribution of alveolar proteinosis? Typical age group?
Middle aged, smoking males
Crazy-paving = GGO + interlobular septal thickening
What findings on broncho-alveolar lavage would support diagnosis of alveolar proteinosis ?
Milky white fluid. Foamy macrophages - periodic acid-schiff postive
Typical organism responsible for alveolar proteinosis infections?
Nocardia
Miliary TB - does this occur in primary or post-primary?
Both
Proportion of those with mesothelioma that have pleural plaques on radiography?
20%
Mesothelioma definition
Malignant neoplasm of serosal membranes
Fibrosing mediastinitis complications?
Pulmonary vessel, SVC, oesophageal obstruction/occlusion
Fibrosing mediastinitis types, and characteristic imaging appearances?
Focal - right paratracheal and subcarinal lymph node enlargement, dense calcification
Diffuse - extensive soft tissue thickening in mediastinal soft tissues
Fibrosing mediastinitis associations
Riedell’s thyroiditis
Retroperitoneal fibrosis
Organisms associated with fibrosing mediastinitis ?
Histoplasmosis capsulatum
TB
